Heat exchange device



Oct; 11, 1932.

J. E. BLACK- HEAT EXCHANGE DEVICE Original Filed June '7, 1928 r ATTORNEY:

INVENTOR j /m 15M Patented Oct. 11, 1932 UNITED STATES PATENT OFFICE JOHN E. BLACK, BUHSON, NEW JERSEY, ASSIGNOR TO THE BABOOCK & W IIOOI COMPANY, OI BAYONNE, NEW JERSEY, A OOBPOBATION OF NEW JERSEY HEAT EXCHANGE DEV CE Application filed June 7, 1928, Serial No.

understood from the description in connection with the accompanying drawing in which Fig. 1 is a vertical section through an illustrative embodiment of the invention; Fig. 2 is a section along the line 22 of Fig. 4; Fig. 3 is a section similar to Fig. 2 on an enlarged scale partly broken away; and Fig. 4 is a side view partly broken away taken along the line 44 of Fig. 1.

In the drawing reference character 1 indicates the casing of the heater that is rectangular in cross section. It is rovided with an air inlet 2 at the upper en soarranged that the air passes through the inside of the tubes of the heater. Tube plates 3 and 4,

. may be inclined at an angle and may be arallel to each other. They are locate at opposite ends of the casing and the ends of the tubes 5 that extend through the casing are connected to these tube plates. These tubes are preferably arranged in rows of staggered tubes. A hot gas inlet 6 is provided on. one side near the end opposite the air inlet 2 and an outlet 7 is provided for the gases on the same side near the other end.

In order to prevent a dead space or inactive surfaoe from being resent in the lower left hand ortion of t e tubes as shown in Fig.1, ba es extend from the inlet'6 partially across the heater. The baflies may be made up of rods that cross each other in lanes between the tubes. One of the baflles which extends from'the upper edge of the inlet 6 preferably parallel to the tube plate 4 from side to side of the casing across a fewof the tubes, is made up of rods 8 and 283,478. Renewed September 22, 1931.

rest upon a cross bar 12 that is made sinuous n shape, if necessary, so as to extend through a space between tubes as shown in Fig. 2. The cross bar 12 rests upon supports 13 that may be supported by rings or clamps 14 that are attached to some of the tubes 5.

Another bafile that is wider than the one just described extends from near the middle of the inlet 6 in a similar direction across a larger number of the tubes 5. This bafile is also made up of rods 19 and 20 that cross each other in the lanes between the tubes. The rods 19 and 20 at one end are hooked over a cross bar 21 that rests upon clam s or rings 22 on some of'the tubes 5 and t 0 other ends of the rods 19 and 20 rest upon a cross bar 23 that is similar to the cross bar 12. The cross bar 23 is supported by supports 24 that rest upon rings or clamps 25 on some of the tubes 5. V

The rods 8, 9, 19 and 20 which makeup the baflles inay be made of different sizes to vary the amount of gas that passes between the rods and the outside surfaces of the tubes 5, thus regulating the amount of gases that will leak through these baflles, the remainder being caused to pass beyond the inner edges of thebafiles. By this arrangement, the heating gases which enter the heater through the inlet 6 may be more uniformly distributed over the tubes while assing through the heater to the outlet 7. e air to be heated enters through the inlet 2 and passes downwardly through the tubes 5.

' While the invention has been described with the air passing through the tubes 5 and the hot gases along the outside thereof, it is to be understood that the hot gases may be passed through the tubes and the air along the outside thereof, in a similar manner.

I claim:

. 1. In a heat exchanger, a casing, tubes extending through said casing, a fluid inlet on one side of said casing near one end, and a bafile in said casing composed of strips between said tubes.

2. ,In a heat exchanger, a casing, staggered rows of tubes extending through said casing, 4

a fluid inlet on one side of sald casing near one end, and a bame in said casing composed of strips between said tubes.

3. In a heat exchanger, a casing, tubes extending through said casing, tube plates at. the ends of said tubes, a fluid inlet on one side of said casing near one end, and a baflie in said casing composed of strips between said tubes.

4. Ina heat exchanger, a casing, tubes extending through said casin tube plates at the ends of said tubes, a flui inlet on one side of said casing near one end, and a baflie in said casing composed of strips between said tubes, said baflie being substantially parallel to said tube plates.

5. In a heat exchanger, a casing, tubes ex- I tending through said casing, a fluid inlet on one side of said casing near one end, and a baflle in said casing composed of strips between said tubes, said baffle being supported upon said tubes.

- 6. In a heat exchanger, a casing, tubes extending through said casing, a fluid inlet on one side of said casing near one end, and a baflle in said casing composed of strips between said tubes of less widths than the distances between said tubes.

7. In a heat exchanger, a casing, tubes extending through said casing, a fluid inlet on one side of said casing near one end, and baflies of different widths in said casing composed of strips between said tubes.

8. In an alr heater, a casing an air inlet and an air outlet at opposite en s of said casing, a gas inlet and a gas outlet on the same side of said casing and baflies of diflerent widths composed of strips in said casing.

9. In an air heater, 'a casing, an air inlet and an air outlet at opposite ends of said casing, a gas inlet and a gas outlet on the same side of said casing and strip baflies supported upon said tubes near said gas inlet.

10. In an air heater, a casing, an air inlet and an air outlet at opposite ends of said casing, a gas inlet and a gas outlet on the same side of said casing, and strip bafiles near said gas inlet partially filling the spaces between the tubes.

11. In a heat exchanger, a casing, tubes ex tending through said casing, a fluid inlet on one side of said casing near one end, and a baflie in said casing composed of strips with straight edges between said tubes.

12. In a heat exchanger, a casing, tubes that part of the gases are caused to flow through the baflle and along/the tubes and the remainder of the gases are diverted beyond extending through said casing located so as to providelanes between said tubes and a baflle in said casing composed of strips lying in said lanes.

13. In a heat exchanger, a casing, tubes extending through said casing, a gas inlet on one side of said casing near one end, a baflie extending part way across said tubes opposite said gas inlet for directing the flow of gases across the tubes toward the opposite side of said casing, said baflie being so constructed 

